For the Canon EOS 5D MKII digital SLR camera, the Eg-S Focusing Screen (Manual Precision Matte) is designed for manual focusing with high-speed lenses (f/2.8 or faster). The Ee-S screen has finer microlenses than the Ee-A or Eg-D along with a steeper parabola of focus to make the image pop in and out of focus more vividly in the viewfinder. However, the Eg-S focusing screen is not recommended ... More

For the Canon EOS 5D MKII digital SLR camera, the Eg-S Focusing Screen (Manual Precision Matte) is designed for manual focusing with high-speed lenses (f/2.8 or faster). The Ee-S screen has finer microlenses than the Ee-A or Eg-D along with a steeper parabola of focus to make the image pop in and out of focus more vividly in the viewfinder. However, the Eg-S focusing screen is not recommended for slower lenses because it's not very bright.
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